Cutting tool insert



FIG. 1 is a perspective view taken from the right side and top, of a cutting tool insert showing my new design;

FIG. 2 is a perspective view taken from the rear and left side;

FIG. 3 is a right side elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a top plan view;

FIG. 6 is a front elevational view; and,

FIG. 7 is a rear elevational view thereof. 

The ornamental design for a cutting tool insert, as shown. 